Ultralight, ultrawarm--we made these gloves with lightweight PrimaLoft insulation, so they're perfect for stashing in your bag or pocket until you need them.Why We Love ThemWe took the innovative technology that's featured in our popular Packaway Outerwear to make these ultralight, exceptionally warm gloves. Originally developed by NASA, the Aerogel technology provides more warmth and with very little weight, so you stay warm and comfortable all day long.